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Washington State University
Gardening in Western Washington -
Native Plants
(Identifying, Propagating & Landscape)
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Which Native Plants Should I Use? |
Imitate Nearby
Natural Settings
The best way to
determine which native plants are appropriate for your property
is to identify the native plants growing in the surrounding area
under similar conditions, including amount of sun, type of soil,
amount of moisture in the soil, and types of neighboring plants.
Note which native
species grow near other native species, because this can be a
good indication of which plants can be planted together without
one species taking over. In order to attract a variety of native
birds and butterflies, plant as many of the plant species you
see growing naturally as possible. In addition, select and
arrange the plants so that they vary in height from taller trees
to ground covers, and so that you create a mixture of plant
densities (some clumped, some spaced, and some open areas).
Starting From
Scratch
1. Evaluate Your Yard
If there aren't many
native plants nearby, you can still figure out which natives are
appropriate once you determine how much moisture and sunlight
the planting area gets, and how well the soil holds moisture.
Take note of which areas receive full sun throughout the day,
which receive sunlight only part of the day, and which areas are
in the shade most or all of the day. Also notice whether the
shade is complete, or if patches of sunlight filter through. You
may find it helpful to draw a map of your yard. Which includes
your house and the paths you and others use when coming or
going.
To evaluate how
moist the soil is and how well it holds moisture, dig a hole in
the ground about six inches deep and six inches wide. Look at
and feel the soil you remove from the hole to see how moist or
dry it is, and whether it has a lot of sand, gravel, organic
matter, or clay. Sand will feel gritty and does not hold
together. Clay feels slippery and can be molded into a long
ribbon when moist. Then fill the hole with water, and watch how
fast the water soaks into the ground. There is no hard-and-fast
rule here, but if the soil soaks the water up so fast you can't
fill it with water, you have very well-drained soil. If the
water is still in the hole two hours later, you definitely have
poorly-draining soil. You may want to dig a number of these test
holes in different areas to see if soil conditions are the same
throughout your yard.
Take note
of areas that are near streams or other bodies of water. Also
pay attention to whether there are areas of pooling or continual
dryness. Rather than seeing these as a detriment, plan to place
plants that thrive in those conditions for great results.
2. Use Native Plant
Associations to Mimic Nature
Once you have
determined the amount of sunlight, moisture and type of soil on
your site, you can use the native plant associations that follow
to decide what plant to install. Rather than provide a list of
plants from which to haphazardly pick-and-choose, we suggest
referring to the plant associations so you can re-create the mix
of natives that normally grow together under natural conditions.
Each native plant
association is named for the amount of sunlight and soil
moisture occurring where that association typically grows. To
find the association appropriate to your property, or
portions of it, look for the sun-moisture combination existing
in the area you want to plant. While not exhaustive, the
associations listed cover the most common situations and species
found in our region.
Each native plant
association begins with a description of the micro-climate
setting (sunlight, soil, water) and what the vegetation growing
there would look like in the wild. The entire area you wish to
plant probably won't fit just one description. Having two or
more micro-climates gives you a wider palette of plants from
which to chose. For each plant, make sure it matches the amount
of sunlight, type of soil, and amount of moisture. The rest of
the description will give you an overall idea of what the area
will eventually look like if you plant the suggested species.
Most of the
descriptions simply refer to "canopy" (the uppermost layer of
vegetation), "under story" (smaller trees and shrubs below the
canopy), or "ground covers" (herbaceous plants, ferns, and other
low-lying plants).
Planting numerous
types of native plants will create diversity that will attract
native birds and butterflies and continue looking natural over
the years. Take note of the native plants that grow in the area,
and feel free to add these species to your list of plants.
Before you go
shopping for any of these plants, write down each plant's
unique, scientific (Latin) name. Many of the plants listed have
more than one common name and may share their common name with
other plants.
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Credit:
Leigh, Michael. Grow Your Own Native Landscape.
Revised Edition, June 1999. |
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